1000090550 has 12 divisors (see below), whose sum is σ = 1860168516. Its totient is φ = 400036200.

The previous prime is 1000090523. The next prime is 1000090579. The reversal of 1000090550 is 550900001.

It is a super-2 number, since 2×1000090550² = 2000362216398605000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10000856 + ... + 10000955.

It is an arithmetic number, because the mean of its divisors is an integer number (155014043).

Almost surely, 2^1000090550 is an apocalyptic number.

1000090550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000090550 is a deficient number, since it is larger than the sum of its proper divisors (860077966).

1000090550 is a wasteful number, since it uses less digits than its factorization.

1000090550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20001823 (or 20001818 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 1000090550 is about 31624.2082904853. The cubic root of 1000090550 is about 1000.0301824223.

Adding to 1000090550 its reverse (550900001), we get a palindrome (1550990551).

The spelling of 1000090550 in words is "one billion, ninety thousand, five hundred fifty".